Trump supporters threatened election officials and their families after they refused to quash his 2020 defeat, a congressional panel has heard.
The speaker of Arizona's statehouse, Rusty Bowers, told the committee probing last year's Capitol riot that the harassment continues to this day.
A Georgia voter counter said she was afraid to leave home after ex-President Donald Trump specifically targeted her.
The House of Representatives panel accuses Mr Trump of an attempted coup.
The select committee has conducted a nearly yearlong investigation into how Trump supporters invaded Congress on 6 January 2021 to disrupt lawmakers as they certified Democrat Joe Biden's election victory.
On Tuesday, in the fourth public hearing so far, the panel heard from election workers in the states of Arizona and Georgia. Mr Biden defeated Mr Trump in both states, which had previously backed Republicans for the White House.